Wash herring fillets and roll up, starting from the tail. Place in a baking dish and add the stout-and-vinegar mixture. Add all other ingredients. Cover with baking parchment or foil and bake in a moderate oven (about 180ºC ) for 20 minutes. Remove from oven, allow to cool, and serve. Makes 4 servings. From the files of Al Rice, North Pole Alaska. Feb 1994